Double-sided signal clipping in ACO-OFDM wireless communication systems

Svilen Dimitrov, Sinan Sinanovic, Harald Haas

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In this paper, the impact of double-sided signal clipping on optical wireless communication (OWC) systems employing asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) is investigated. Time domain signal clipping is introduced due to biasing issues or physical limitations of the front-ends. These include insufficient forward biasing of the emitter and the maximum driving power limit of the emitter and/or the detector. The clipping noise can be modeled according to the Bussgang theorem and the central limit theorem as attenuation of the subcarriers at the receiver and addition of zero-mean complex Gaussian noise. The attenuation factor and the clipping noise variance are determined semi-analytically and employed in the derivation of the signal-to-noise ratio (SNR) at the receiver. Finally, the theoretical SNR is verified through a bit-error ratio (BER) simulation.
    Original languageEnglish
    Title of host publicationIEEE International Conference on Communications (ICC 2011)
    PublisherIEEE
    Pages1-5
    Number of pages5
    ISBN (Print)978-1-61284-232-5
    DOIs
    Publication statusPublished - 2011

    Keywords

    • wireless communication systems
    • OFDM
    • signal clipping

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